Inverters Sample Electrical Engineering Job Questions, Practice Questions on Inverters, Job Interview Questions, Written Test Questions:

What is the operating principle of single phase voltage source inverters?

What are force commutated thyristor inverters and their types?

Various types are

• Modified Mc Murray half bridge inverter
• Modified Mc Murray Full bridge inverter
• Modified Mc Murray Bedford Half bridge inverter
• Modified Mc Murray Bedford Full bridge inverter

What are the waveforms for the above types?

Explain three phase bridge inverters and the working principle – 180 degree mode and 120 degree mode voltage

Question about Methods for Voltage control in single phase inverters:
i)    External Control of AC Output voltage
ii)    External Control of DC I/P Voltage
iii)    Internal Control of Inverter

What is pulse width modulated inverter?

How can we reduce harmonics in inverter O/P voltage?
Various methods:
i)    By PWM
ii)    By transformer connections
iii)    By Stepped wave inverters

The different types of current source inverters:
i)    Single phase inverter with ideal switches
ii)    Single phase capacitor commutated inverter with R Load
iii)    Single phase auto sequential commutated inverter

Explain series and single phase parallel inverters.

What are uses / applications of inverters in industries?

Comparison of line commutated & force commutated converters.

What is the working principle and disadvantages of single phase half bridge inverter?

How is the output power doubled in single phase full bridge inverter compared to single phase half bridge inverter?

How do we design the commutating components with minimum commutation energy? Explain with the voltage and current waveform.

Why do we have to control the voltage at output terminals of an inverter?

Explain the working of single phase CSI with ideal SCR and a capacitor load?

Numerical Problems regarding calculation of circuit turn off time for CSI are important.